Colonoscopy in Honolulu, HI

As with any procedure, it’s natural to have questions. Whether this is your first colonoscopy or you’ve had one before, you may be curious to understand more before your upcoming appointment. While our gastroenterologist, Stephen K. Buto, M.D., is always happy to answer any and all questions that you have about colonoscopies, we’ve also compiled some of the top questions about this screening tool for our patients to better understand the purpose and importance behind getting a colonoscopy.

What is a colonoscopy?

This diagnostic procedure is the best way to examine a person’s large intestines (also known as the colon). It involves inserting a small, flexible tube known as a colonoscope into the rectum and guiding it gently through the colon. This quick, outpatient procedure is performed right here in our office under sedation.

Why are colonoscopies performed?

Colonoscopies make it possible for our gastroenterologist to examine the lining of the large intestines. Colonoscopies may be used to determine the cause of your gastrointestinal symptoms or they can be used purely as a screening tool to prevent colorectal cancer (or to detect cancer early). Our gastroenterologist may recommend a colonoscopy if you are dealing with,

  • Unexpected weight loss
  • Abdominal pain
  • Persistent bowel changes (e.g. diarrhea or constipation)
  • Blood in the stool or black stools

During your colonoscopy we can also remove polyps, stop bleeding and take tissue samples for further testing.

When should I start getting routine colonoscopies?

Everyone, regardless of whether they are experiencing symptoms or not, should start visiting their gastroenterologist for routine colonoscopies by the time they turn 50 years old. Those with a family history of colorectal cancer may want to discuss with their gastroenterologist about whether they might benefit from getting screened earlier.

If your colonoscopy results come back normal and you have a low risk for colorectal cancer, then you’ll only need to come in every 10 years for routine colonoscopies until you reach 75 years old.

What are the symptoms of colon cancer?

Since colon cancer doesn’t typically cause symptoms in the very early stages this is why getting a routine colonoscopy is an important screening tool for both men and women as they approach middle age. A colonoscopy is the most effective procedure we have for detecting cancer early on. As colorectal cancer progresses you may experience,

  • Rectal bleeding
  • Anemia
  • Persistent fatigue
  • Unexplained and sudden weight loss
  • Bowel changes

If you’ve just turned 50, it’s important that you protect your health by getting routine colonoscopies. Call Stephen K. Buto, M.D. today at (808) 524-7676 to schedule yours.

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Stephen K. Buto, M.D.


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9:00 am-12:00 pm


9:00 am-12:00 pm

2:00 pm-4:30 pm


9:00 am-12:00 pm

2:00 pm-4:30 pm





Patient Testimonials

  • "Thank you very much for your efficient and professional caring to take care of my colon health."
  • "Thank you so much for taking the time to meet with me to address my concerns and to perform the procedures. Your warm bedside manner and compassion were greatly appreciated! I am very thankful to have someone so thorough investigating my symptoms. Thank you!!!"
  • "Many thanks for a job well done. It was a huge relief going through the ordeal. Your easy going, soft sell of the procedure was a big help. It helped to put things in perspective and allowed me to be less apprehensive. Your efficient team worked swiftly and well. We are fortunate to have such up-to-date facilities and trained staff. We are very fortunate to have such fine medical care."
  • "Thank you for the extra special care you gave my dad during his recent gall bladder episode. My family and I truly appreciate your attention to dad’s case, your kindness, compassion, thoroughness, being there in the middle of the night, communication with the family, and just the heart with which you serve. I wish there were more doctors like you. God bless and keep you and your family."
  • "I can’t thank you enough for the extraordinary effort you went through to help me reach a conclusive diagnosis. You went over and beyond any expectation, and I thank you from the bottom of my heart for all the time and effort. My mind is at ease that I had the expertise of you and your colleagues to help me."
  • "Thank you for service above and beyond on a long Saturday afternoon, when my husband was in so much pain. It was very comforting to know that you were just a phone call away. We needed your instructions and advice, and it kept him from a hospital stay."
  • "Thank you for your wonderful expertise and care."
  • "It has been one week since my first colonoscopy. Thank you so much that the entire process and procedure went so smoothly. The time and effort in providing a thorough pre-consultation and explanation relieved me of my anxiety and concerns. The communication and follow through by your office was very helpful and appreciated! I sincerely appreciate your kind attention and excellent medical care in the successful accomplishment of my procedure"
  • "Thank you so much for your attentive and thorough care. I appreciate your acknowledging my anxiety over the anesthesia. And your attempt to alleviate it. It worked beautifully!!!"
  • "I have had my second procedure with Dr. Buto and Dr. Leong in 10 years. They and their staff were the most professional and courteous people that I have ever met. Everything was explained to me as to what was going to happen for prep, the procedure and after the procedure. I would highly recommend Dr. Buto, Dr. Leong and their staff."